Firms Hope for Fewer Technical Problems and an Influx of Young, Healthy Enrollees

This fall, health insurers are fastening their seat belts—and hoping the ride will be a bit less bumpy than last year's.

On Nov. 15, the health-law marketplaces will reopen for business, selling coverage to millions of Americans. Last October's debut of the online exchanges was widely seen as disastrous, with technical malfunctions early on preventing many consumers from buying plans or freezing them in confusing limbo.